Window-ventilator dust-collecting mechanism.



N. M. ROSENDAHL. WINDOW VENTILATOR DUST COLLECTING MECHANISM.

APPLICATION FILED JAN. 30,1911. 1

Patented Sept. 21, 1915.

NILS M. ROSENDAI-IL, OF CHICAGO, ILLINOIS, ASSIGNOR TO FREDERICK G. AUSTIN, OF CHICAGO, ILLINOIS.

WINDOW-ITEN'IILATOR DUST-COLLECTING MECHANISM.

Application filed January 30, 1911.

To all whom it may concern Be it known that I, NILsM. RosnNDArIL, a citizen of the United States of- America, and resident of Chicago, Cook county, Illinois, have invented a certain new and useful Improvement in WVindow-Ventilator Dust- Collecting Mechanism, of which the following is a specification.

My invention relates to window ventilators of the kind in which a box or hollow structure is mounted in a; frame which is adapted to be placed in the window below the lower sash thereof.

It relates more particularly to that type of window ventilator in which. the dustcatching mechanism that purifies the air before it passes into the room is mounted in a receptacle that slides like a drawer in and out of the said box or hollow structure.

Generally stated, the object of my invention is to provide an improved and hlghly efficient window ventilator of the foregoing general character.

A special object is to provide improved and highly efiicient mechanism for. catching the dust, which can-be readily removed and cleaned, and which willtend more effectively to purify the air without appreciably or undesirably retarding the free and easy passage or influx thereof throughthe ventilator and into the room to be ventilated;

It is also an obj ect to provide certain details of construction tending to increase the general efiiciency of a window ventilator of this particular character.

To the foregoing and other useful ends my invention consists in matters hereinafter set forth and claimed.

in the accompanying drawings Figure 1 is atransverse section of a window ventilator embodying the principlesof my invention, showing the adjacent portions of the window. sill and sash in section, and illustrating the manner in which the ventilator is placed in position in a partially open window for use in ventilating the room; Fig. 2 is a perspectiveof one end portion of the receptacle or drawer that contains the dust-catching mechanism. Fig. 8 is a perspective of one end portion of the box or hollow body structure in which the said receptacle or drawer is inclosed and held in ilace.

1 As thus illustrated, my invention comprises a rectangular frame A whichis adapt- Specification of Letters Patent. Patented Se t. 21 1915 Serial No. 605,349.

ed to be placed upon the window sill B, in the manner shown, so that the lower edge of the lower sash will rest upon the top of said frame. 'The sheet-metal box or hollow body structure D has a depressed and perforated intake or outer end wall d that inclines outwardly so that it faces downward in the manner shown. There is a lip d at the upper edge of this perforated intake or end wall which serves as an over-hang to preventv rain or snow from clogging the perforations in the intake, the said lip serving to bring the drip a sufficient distance away from the said perforations to accomplish this purpose. The topwall of the box has a short outer portion d that inclines downwardly at a sharper angle than the balance thereof, and the bottom wall has a still shorter portion dig that has the same angle, so that the outer end portion of the box is in effect bent or deflected downward. The inner end of said box is provided around its mouth with flanges 03* by which it is securely fastened to the frame A in any suitable manner.

The receptacle or drawer E is provided with straight'sides and bottom, and with an inclined outerend wall 6, which latter is perforated. The said receptacle or drawer is adapted to fit and slide in the said box D, as shown in Fig. 1, and has a rounded or outwardly bulging outer end wall 6 provided' near its upper edge with a row of slots or openings 6 that serve as'the means by which the air is allowed to escape from the ventilator into the room. These openings or slots are controlled by a sort of damper comprising a curved plate 6 that fits and slides up and down on the inner surface of the wall 6, and for this purpose the said damper plate is provided with a knob or handle 6 by which it is moved up and down to open and 'close the said slots or openings. The transverse partitions 6 e and e are inclined forward or outward and secured in place with their lower edges at or near the bottom of the receptacle or drawer, and with their upper edges provided with flanges which are disposed'a distance below the top wall of the box. These partitions, like the wall 6, are perforated throughout the upper half of each wall, approximately, whereby thelower half of each wall serves as a sort of baflle'plate for directing the current. of air upward. The three similar transverse partitions e e and 0 alternate with said:

perforated to the flanged upper edge of the wall 6 in the manner shown inFig. 1. The said sheet offlexible and porous material passes from e downward and under the flanged lower edge of the wall 6 then upward and over the flanged upper edge of the wall 6 then downward and under the flanged lower edge of'the. wall a thenupward and over the flanged upper edge of the wall 6 then downward and under the flanged lower edge of the wall 0 and then upward toits other point of attachment 0 upon the under side of the flanged upper edge of the wall 6 at the other end of the receptacle or drawer. The said flexible and porous material may be ofany suitable character, such as cheese cloth or any other suitably porous cloth, and it will be understood that it is preferably of'the same width as the interior of -the receptacle or drawer. With this arrangement the interior of the drawer is divided by said partitions into a number of transversely disposed compartments, and by' the, said sheet ofcloth or other material into upper and lower compartments. I

In use, the mode of operation is'as follows: Outside air passes through the perforated wall cl and into the interior of the box at the outer end thereof- A portion of such air then passes through the perforated wall 6 at a point above the cloth or flexible material 6 and the balance of the incoming air passes through said wall 6 at a point below said sheet of cloth or flexible material. The double air currents are thus forced to zig zag up anddown through the interior of the receptacle or drawer-in the manner indicated by the arrows in Fig. 1, and with the result that dust isprecipitated by the baifle plates or imperforate portions of the partitions, and caught by the porous cloth before the air finally passes from the interior of the drawer through the openings 6 and into the room. The circuitous paths'thus provided for the incoming air, and the back and forth arrangement of the cloth or porous material, combine to produce a very thorough purification of the air as it passes through the ventilator. Some air, of course, will pass through the cloth, and thus the latter serves also as a filter for the air. Also,

it has a rough surface which "collects the dust. The dust thus collected can be easily gotten rid of, after an accumulation there of, by pulling out-the drawer and removing the cloth or other material therefrom.

W hen thoroughly cleaned the cloth can be replaced in the drawer, and the latter can be returned to'its position in theibox.

F rom the foregoing it will be seen that I provide a simple and improved window ventilator in which readily removable means are provided. for catching the dust and 7 thereby purifying theair before it escapes into the room. 7

I do not limit myself to the exact construction shown and described.

I WVhat I claim as my invention is z l. A. window ventilator vdust catching A mechanism comprising ,a zigzag strip of cloth, and means cooperating therewith, serving to cause the air to follows-the zigzag course of thecloth. a a a 2. A window ventilator dust catching mechanism comprising. a zigzag strip of cloth, and. means cooperating therewith, serving to cause the air to follow the zigzag course of the cloth, said means including a series of perforated plates.

3, A window ventilator dust catching mechanismcomprising a zigzag strip of cloth, and means cooperating therewith, serving to cause the air to follow the zigzag course of the cloth, said means comprising a series of plates which deflect the air and i hold said'cloth in position.

a. A window ventilator dust-catching mechanism arranged-for causing the air to zigzag up and down in passing through the ventilator, said mechanism comprising a zigzag strip of cloth arranged for dividing the air into upper and lower currents, and

upper and lower plates holding the cloth in position, said upper. plates alternating with the lower plates and providing passages for successively impinging the air current against the cloth. i

5. A window ventilator dust-catching mechanism arranged forcausing the air to zigzag up and down in passing through the ventilator, said mechanism comprising a flexible sheet of porous material arranged for dividingv the air into upper and lower currents, and means providing inlets for both of said currents of air. T

6. A .window ventilator dust-catching mechanism arranged for causing the air to zigzag up and down in passing through the ventilator, said mechanism comprising a se-' plates providing passages for the air above series of opposing surfaces which catch the their upper edges, and said intermediate dust, and means for admitting air above and plates providing passages for the air below below said cloth at the outer end of said their lower edges. ventilator. 15 5 7. A Window ventilator dust-catching Signed by me at Chicago, Cook county,

mechanism having means for causing the air Illinois, this Qth day of January, 1911.

to zigzag up and doWn in passing through O the ventilator, and a receptacle containing NILQ ROSENDAHL' said mechanism, said means including a Witnesses: readily removable sheet of cloth which is E. H. CLEGG,

flexed alternately up and down to provide a S. LEWIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

